 
(* ::Section:: *)
(* CSPE *)
(* ::Text:: *)
(*CSPE[p, q] is the D-4-dimensional scalar product of p with q and is transformed into CartesianPair[CartesianMomentum[p, D-4],CartesianMomentum[q, D-4]] by FeynCalcInternal. CSPE[p] is the same as CSPE[p,p] ( $=p^2$)..*)


(* ::Subsection:: *)
(* See also *)
(* ::Text:: *)
(*SPE, ScalarProduct, CartesianScalarProduct.*)



(* ::Subsection:: *)
(* Examples *)



CSPE[p,q] + CSPE[q]

CSPE[p-q,q+2p]

Calc[ CSPE[p-q,q+2p] ]

ExpandScalarProduct[CSPE[p-q]]

CSPE[a,b]//StandardForm

CSPE[a,b]//FCI//StandardForm

CSPE[a,b]//FCI//FCE//StandardForm

FCE[ChangeDimension[CSP[p,q], D-4]]//StandardForm
